Pharrell Williams' hat somehow managed to outshine everything else at the Grammys last month — even the simultaneous marriage of 33 couples wasn't enough to stop the world looking on with either envy or humor. The Vivienne Westwood-designed "Mountain" hat was the subject of thousands of jokes throughout the ceremony, and Williams is hoping to capitalize on his fame with an auction for charity. Hosted by eBay, the auction is raising money for the musician's charity From One Hand To Another. It's currently going for more than $10,000, but expect that number to rise significantly over the next nine days, especially when Arby's finds out it can buy its hat back.